Dustproof shaft hole structure of diamond pre-milling cutter
By setting up a dust removal corridor on the center boss of the diamond premill and setting up a diverter block on the end surface of the tool body, the difference in air pressure difference and air flow velocity is used to solve the problem of dust accumulation, significantly improving the dustproof performance of the premill and simplifying the Disassembly and assembly and maintenance process.
Patent Information
- Application Number
- CN202421024746.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-11
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-05-11
AI Technical Summary
In the harsh working environment, dust is prone to adhere to the tiny gaps between the shaft hole and the motor drive shaft, resulting in difficulty in disassembly and inconvenient maintenance, and even inability to disassemble and disassemble, which increases work troubles.
Several dust removal corridors extending from the inside to the outside are arranged on the central boss of the diamond premill. When the tool body rotates at a high speed, the air flow speed at the outer end is greater than the inner end. The dust is discharged by using the air pressure difference, and the tool body is set up in combination with the end surface of the tool body. The shunt block enhances the airflow outflow trend and significantly improves the dustproof performance of the shaft hole.
It effectively reduces dust accumulation in the shaft hole, prevents jamming, simplifies the maintenance and replacement process of premill cutting, and significantly improves the dustproof performance of the shaft hole.
Smart Images
Figure CN222200957U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of woodworking tools, in particular to a pre-milling cutter. Background Art
[0002] Disc pre-milling cutters are a type of cutting tool used in edge banding machines during the production of panel furniture. They are set before the gluing process. Their main function is to pre-mill the edge of the board (opening seam) to make the edge of the board sufficiently flat, so that the subsequent gluing, belt pressing and other processes have better effects. Diamond pre-milling cutters are improved products of ordinary alloy pre-milling cutters. By setting diamond cutting edges, the milling life of the pre-milling cutters can be greatly improved. Figure 1 The figure shows the existing pre-milling cutter. Due to its harsh working environment, there are many small particles of dust, wood chips, etc. in the working environment. Although most of them can be discharged through the dust removal system, it is still inevitable that a lot of dust will fall and adhere to the tiny gap between the pre-milling cutter shaft hole and the motor drive shaft during long-term working. As the use time increases, day by day, this makes it difficult to disassemble and assemble the pre-milling cutter, which is not convenient for subsequent maintenance and replacement, and even leads to the dilemma that the pre-milling cutter cannot be disassembled. At this time, the mechanics have to disassemble the pre-milling cutter by spraying anti-rust liquid, injecting lubricant, or even violent disassembly, which adds unnecessary trouble to the actual work. Summary of the invention
[0003] The utility model aims to provide a dustproof shaft hole structure of a diamond pre-milling cutter which can effectively reduce dust interference.
[0004] In order to achieve the above-mentioned invention object, the technical solution adopted by the utility model is: a dustproof shaft hole structure of a diamond pre-milling cutter, comprising a disc-shaped cutter body, a center boss is arranged at the center of the cutter body, and a plurality of diamond milling teeth are arranged on the outer wall of the cutter body; an shaft hole is arranged at the center of the center boss;
[0005] The central boss is provided with a plurality of dust removal passages extending from the inside to the outside, the inner ends of the dust removal passages extend to the top of the mounting shaft hole, and the outer ends of the dust removal passages extend to the bottom of the central boss.
[0006] Preferably, the number of the dust removal corridors is six.
[0007] Preferably, the dust removal passage is linear and extends along the radial direction of the blade body.
[0008] Preferably, the dust removal passage is arc-shaped, and the extension direction matches the rotation direction of the blade body.
[0009] Preferably, a plurality of diverter blocks are arranged on the end face of the blade body outside the central boss, and the diverter blocks are evenly distributed in a ring shape around the axis of the blade body; the head end of the diverter block is large and the tail end is small, and the head end matches the rotation direction of the blade body; the outer wall and the inner wall of the diverter block are both in an arc shape protruding outward.
[0010] Preferably, the number of the diverter blocks is six.
[0011] The beneficial effects of the utility model are mainly reflected in that it can significantly reduce the dust accumulation between the pre-milling cutter shaft hole and the drive shaft, prevent the pre-milling cutter from getting stuck, and facilitate maintenance and replacement. Specifically, the utility model sets a dust removal channel on the center boss. During the high-speed rotation of the cutter body, the linear velocity of the center boss (cutter body) at the outer end of the dust removal channel is greater than that at the inner end. Therefore, the air pressure at the inner end of the dust removal channel is higher than the air pressure at the outer end. Driven by the pressure difference, the dust near the upper end of the shaft hole will be discharged outward along the dust removal channel, reducing the risk of dust accumulation there, thereby significantly alleviating the dust accumulation in the shaft hole. The utility model greatly improves the dustproof performance of the shaft hole through a simple dust removal channel design. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a schematic diagram of the structure of the existing disc pre-milling cutter in a top view;
[0013] Figure 2 It is a schematic diagram of the top view structure of the utility model;
[0014] Figure 3 for Figure 2 AA view of the structure shown in;
[0015] Figure 4 This is a schematic diagram of the structure of a preferred embodiment of the utility model;
[0016] Figure 5 This is a schematic structural diagram of another preferred embodiment of the utility model. DETAILED DESCRIPTION
[0017] like Figure 2-5 The dustproof shaft hole structure of a diamond pre-milling cutter shown in the figure comprises a disc-shaped cutter body 1, and a center boss 2 is arranged at the center of the cutter body 1. The center boss 2 is formed by milling an annular sinking area on the end face of the cutter body 1 blank in order to achieve the weight reduction and aesthetics of the cutter body, thereby forming a center boss 2 in the center, and its height is consistent with the height of the outer edge of the cutter body 1. A plurality of diamond milling teeth are arranged on the outer wall of the cutter body 1, and an shaft hole 3 is arranged at the center of the center boss 2. In addition, the conventional design in the prior art will not be described in detail in the present utility model.
[0018] The biggest difference of the present utility model is that the central boss 2 is provided with a plurality of dust removal passages 4 extending from the inside to the outside, such as Figure 2 As shown in , the number of dust removal passages 4 is six, which can of course be more or less. However, since the outer diameter of the pre-milling cutter is generally between 100-150 mm and the inner diameter is about 30, it is generally more appropriate to set six dust removal passages. Figure 3 As shown in , the inner end of the dust removal passage 4 extends to the top of the mounting shaft hole 3, and the outer end of the dust removal passage 4 extends to the bottom of the central boss 2, so that the whole is in a form of being inclined outward and downward.
[0019] The utility model arranges a dust removal passage 4 on the central boss 2. During the high-speed rotation of the cutter body 1, since the linear velocity of the central boss 2 (cutter body 1) at the outer end of the dust removal passage 4 is greater than that at the inner end, the air pressure at the inner end of the dust removal passage 4 is higher than that at the outer end. Driven by the pressure difference, the dust near the end of the shaft hole 3 will be discharged outward along the dust removal passage 4, reducing the risk of dust accumulation there, thereby significantly alleviating the phenomenon of dust accumulation in the shaft hole 3.
[0020] The structures of the upper and lower surfaces of the cutter body 1 are the same, but dust deposition mainly occurs at the upper end of the shaft hole 3, while the lower end is relatively less. However, considering that it can be more flexible during installation, the upper and lower surfaces adopt the same structural form.
[0021] The dust removal passage 4 of the utility model generally extends from the inside to the outside, and can be as follows Figure 2 As shown in FIG, the dust removal passage 4 is in a straight line and extends in the radial direction of the blade body 1. Figure 4 As shown in , the dust removal passage 4 is arc-shaped, and the extension direction matches the rotation direction of the blade body 1. In this way, the dust removal passage 4 has better pumping performance for dust, such as Figure 4 As shown, the blade body 1 rotates counterclockwise, and the arc direction of the dust removal passage 4 adapts thereto.
[0022] On this basis, in order to further improve the pushing performance of dust, a better approach of the utility model can also be: Figure 5 As shown in the figure, a plurality of diverter blocks 5 are arranged on the end surface of the blade body 1 outside the central boss 2, and the diverter blocks 5 are evenly distributed in a ring shape around the axis of the blade body 1. The diverter blocks 5 have a large head end and a small tail end, and the head end matches the rotation direction of the blade body 1. The outer side wall and the inner side wall of the diverter block 5 are both in an arc shape protruding outward. The number of the diverter blocks 5 is generally set to six.
[0023] During the high-speed rotation of the blade body 1, the airflow velocity outside the diverter block 5 is significantly faster than the airflow velocity inside, which increases the pressure difference between the inside and outside, and the airflow has a significant outflow tendency. The pressure difference change inside and outside the diverter block 5 will indirectly affect the pressure difference at both ends of the dust removal tunnel 4, especially causing the pressure at the outer end to drop, so that the dust removal tunnel 4 has a better dust pushing effect, and finally significantly reduces the dust accumulation phenomenon in the shaft hole.
Claims
1. A dustproof shaft hole structure of a diamond pre-milling cutter, comprising a disc-shaped cutter body (1), a center boss (2) is arranged at the center of the cutter body (1), and a plurality of diamond milling teeth are arranged on the outer wall of the cutter body (1); an shaft hole (3) is arranged at the center of the center boss (2); Features: The central boss (2) is provided with a plurality of dust removal passages (4) extending from the inside to the outside, the inner ends of the dust removal passages (4) extending to the top of the mounting shaft hole (3), and the outer ends of the dust removal passages (4) extending to the bottom of the central boss (2).
2. The dustproof shaft hole structure of the diamond pre-milling cutter according to claim 1, characterized in that: The number of the dust removal corridors (4) is six.
3. The dustproof shaft hole structure of the diamond pre-milling cutter according to claim 2, characterized in that: The dust removal passage (4) is in a straight line shape and extends along the radial direction of the blade body (1).
4. The dustproof shaft hole structure of the diamond pre-milling cutter according to claim 2, characterized in that: The dust removal passage (4) is arc-shaped, and its extension direction matches the rotation direction of the blade body (1).
5. The dustproof shaft hole structure of the diamond pre-milling cutter according to claim 4, characterized in that: A plurality of diverter blocks (5) are arranged on the end surface of the blade body (1) outside the central boss (2), and the diverter blocks (5) are evenly distributed in a ring shape around the axis of the blade body (1); the diverter blocks (5) have a large head end and a small tail end, and the head end matches the rotation direction of the blade body (1); the outer side wall and the inner side wall of the diverter block (5) are both in an arc shape protruding outwards.
6. The dustproof shaft hole structure of the diamond pre-milling cutter according to claim 5, characterized in that: The number of the diverter blocks (5) is six.